/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.wsinfra.deployment.impl;

import java.util.Enumeration;
import java.util.Hashtable;

import javax.xml.namespace.QName;
import javax.xml.soap.SOAPMessage;

import org.apache.xmlbeans.XmlCursor;

import cgl.narada.wsinfra.deployment.RoleRetriever;
import cgl.narada.wsinfra.exception.ProcessingException;
import cgl.narada.wsinfra.schemas.soap.EnvelopeDocument;
import cgl.narada.wsinfra.schemas.soap.EnvelopeType;
import cgl.narada.wsinfra.util.SoapEnvelopeConversion;

/** This class parses a SOAP Message to retrieve the set of trageted roles
    contained within the SOAP Message. 

    @author Shrideep Pallickara
    $Date: 2005/07/29 22:44:01 $
    $Revison$
*/

public class RoleRetrieverImpl extends RoleRetriever {
  
  private static final RoleRetriever instance = new RoleRetrieverImpl();
  private static final QName actorQName = 
  new QName("http://schemas.xmlsoap.org/soap/envelope/", "actor");

  private SoapEnvelopeConversion soapEnvelopeConversion;
  
  private Hashtable roles;
  private String moduleName = "RoleRetrieverImpl: ";

  private RoleRetrieverImpl() {
    roles = new Hashtable();
    soapEnvelopeConversion = SoapEnvelopeConversion.getInstance();
  }
  
  /** This indicates that this particular SOAP node needs to process it. */
  private String roleNext="http://schemas.xmlsoap.org/soap/actor/next";


  public static RoleRetriever getInstance() {
    return instance;
  }

  
  /** Retrieve the set of targeted roles in a SOAPMessage */
  public synchronized Enumeration retrieveRoles(SOAPMessage soapMessage) {
    roles.clear();
    EnvelopeDocument envelopeDocument;
    try {
      envelopeDocument=soapEnvelopeConversion.getEnvelopeDocument(soapMessage);
    } catch(ProcessingException pe) {
      System.out.println(moduleName + pe.toString());
      return roles.keys();
    }

    EnvelopeType envelopeType= envelopeDocument.getEnvelope();
    
    if (!envelopeType.isSetHeader()) {
      System.out.println(moduleName + "NO Header in the SOAP Message");
      return roles.keys();
    }

    XmlCursor headerCursor = envelopeType.getHeader().newCursor();
    
    int index=0;
    headerCursor.push();
    while (headerCursor.toChild(index)) {
      String role = headerCursor.getAttributeText(actorQName);
      
      if (role != null) {
	roles.put(role, role);
      }
      index++;
      headerCursor.pop();
      headerCursor.push();
    }
    
    System.out.println("Index = " + index);
    return roles.keys();
  }

  

}


